Climate of Oslo, Norway

Dfb

Köppen-Geiger climate classification: Dfb — Cold, no dry season, warm summer.

Elevation: 9 m · 59.91°N, 10.75°E

Oslo has a mean annual temperature of 7.1 °C and receives 827 mm of precipitation per year (1991–2020 climate normals). The warmest month is July with a mean temperature of 18.1 °C, while January is the coldest month at -2.6 °C. Most precipitation falls in August (97 mm); the driest month is February (44 mm).

Climate Diagram

Walter–Lieth diagram: the red line shows monthly mean temperature (left axis, °C), the blue line monthly precipitation (right axis, mm). Yellow areas mark arid periods (temperature above precipitation), light blue humid periods, dark blue perhumid periods (above 100 mm/month, shown on a compressed 1:10 scale). Scale: 1 °C ≡ 2 mm.

Open in the interactive Climate Explorer →

Climate Table

Month	Mean temperature (°C)	Precipitation (mm)
January	-2.6	57.1
February	-2.2	43.8
March	1.2	45.6
April	6.2	46.7
May	11.7	55.7
June	15.7	75.5
July	18.1	78.2
August	16.9	96.8
September	12.6	87.1
October	6.9	92.4
November	2.3	87.4
December	-1.6	60.2
Year	7.1	826.6

Live Forecast

Looking for the current weather instead of climate averages? Open the live forecast diagrams in WZ Diagrams — 15 weather models, ensemble spread, radar and more.

Data Source

Climate normals and Köppen-Geiger classification: Beck et al. (2023), Scientific Data 10, 724, CC BY 4.0. Period 1991–2020. Classification resolution ≈ 1 km; monthly climate data resolution ≈ 1 km (0.01°, Original 2023 release; predates the January 2026 correction), sampled at the grid cell containing the city coordinates (59.91°, 10.75°). Climate normals describe the long-term average, not current weather.